2. Wear protective eye gear.
If you play sports, work with wood or power tools, or partake in any activities that could potentially injury your eyes, always make sure that you wear protective eye gear. Injuries to the eyes are among the most common causes of keratitis; a ball, elbow, shoulder pad, tree branch, shards of wood or metal, or anything else that could potentially come in contact with your face can scratch your cornea or otherwise damage it. That damage can inflame the cornea, which will then lead to keratitis and the symptoms that are associated with it, including weeping, pain, redness, blurred vision, and light sensitivity; among other things.
To avoid damaging your eyes, make wearing protective eye gear, such as safety goggles or glasses, a point whenever you are engaging in any activity where something could scratch or get lodged in your eye and damage your cornea.